Wire-drawing block.



E. H. CARROLL. WIRE DRAWING- BLOCK. APPLIUATION FILED r123. 13, 1909.

Patented Feb. 3,1914.

'IHHHHH U im m J m; fi gg r ELIBERT H. CARROLL, F WORCESTER,MASSACHUSETTS,

ASSIGNOR T0 MORGAN CONSTRUCTION GOMPANY, OF WORCESTER, MASSACHUSETTS, ACORPORATION OF MASSAGHUSETTS.

WIRE-DRAWING BLOCK.

A To all whom it may concern wire drawing block embodying my present theattendant.

invention. Fig. 2 is a plan view of the same shown in section on line2-2, Fig. 1. Fig. 3 is a detached side view of the upper jaw of thegripping mechanism.

1 Similar reference letters and figures refer to similar parts in thedifferent views;

The object of my present invention is to provide a wire drawing blockwith an improved gripping mechanism for holding the end of the wire atthe beginningof the drawing operation, and to provide means for holdingthe wire gripping mechanism in a recess in the side of the wire drawingblock during the rotation of the block in case the gripping mechanism isrelieved from the strain on the wire, and I accomplish these objects bymeans of the construction and arrangement of parts as hereinafter described and pointed out in the annexed claims.

In the type of drawing blocks to which my invention relates, thegripping mechanism when suddenly relieved from strain by the breaking ofthe wire, for example, is liable to be thrown violently outward bycentrifugal force, striking against anything in its path andjeopardizing the safety of By my" present invention I provide acounteracting force to 're'tain t-he ripping mechanism in the recess ofthe lilock by the rotation of the block itself, and at the same timeallowing the gripping mechanism to be freely withdrawn when the block isat rest to enable the end of the wire to be engaged. I

Referring to the accompanying drawings 1 denotes a wire drawing block ofany known or usual form of construction, suitably mounted upon a tableand connected with a driving mechanism in the manner of wire drawingblocks now in use. In one side of the wire drawing block I provide arecess 2 open at the top and sufiiciently large to receive the wiregripping mechanism 3, and

Specification of Letters Yatent.

Patented Feb. 3,1914.

Application filed February 13, 1909. Serial No. 477,529.

a draw bar 4 pivotally connected at 5 to the gripping mechanism and at 6to a sleeve 7 held upon a fixed stud 8 carried by the wire drawingblock. I I

The gripping mechanism comprises parallel bars forming jaws 9 and 10 ofthe gripp1n mechanism, pivotally connected on opp os1te sides by theparallel links 11, 11, and 12, 1-2. Extending upwardly from the jaw 9 isan arm 13 and extending upwardly from the jaw'lO is a corresponding arm14, said arms being preferably slightly curved and between the arms isinterposed a blade spring 15 with its tension applied to separate thearms 13 and 14 and bring the'opposing faces of the jaws 9 and 10 intocontact. The gripping face of the jaw- 9 is preferably plane, while thatofthe jaw 10 is provided with teeth 16, said teeth, however, beingpreferably formed on a removable piece 17, having a projection 18interlocking the jaw 10 to prevent the longitudinal movement of thetoothed piece 17 The toothed piece 17 is held in position by means of ascrew 19. In order to insert the end of the wire between the jaws 9 and10 the arms 13 and 14 are compressed by hand, causing the jaw 10 to berocked on the links 11 and 12 and separated from the jaw 9 suflicientlyto allow the insertion of the e'nd of the wire 20. As the block 1 isstarted in motion to draw the wire 20 through the die box,'in the usualmanner, the end of the wire will be firmly grasped by the gripping jaws9 and 10, and

as the wire 20 is wound around the periphery of the wire drawing block,as shown in F igs. 1 and 2, the draft of the wire will draw the grippingmechanism into the recess 2 and within the periphery of the block, sothat the coils of wire as they are successively wound thereon will bepushed upwardly ,over the recess 2. The pivotal connections 5, 6 and 8enable the gripping mechanismto be moved upwardly or downwardly orradially outward, as shown by broken lines at 21, Fig. 2.

' During the rotation of the wire drawing block the draft of the wireholds the grip in the recess 2, but in case the wire should break orbecome released from the grip, the centrifugal force of the rotatingblock would tend to throw the gripping mechanism outward. In order toprevent this and keep the gripping mechanism in the access; thefollowing construction has been lprovided: At-

- recess 2, into the tached to the sleeve 7 is a radial-arm 22, which ispivotally connected by a link 23 with a radial arm 24, projecting from asleeve 25 which is pivoted upon a fixed stud 26, carried by the base ofthe wire drawing block. Projecting from the sleeve 25 is an arm 27forming with the arm 24 a bell crank lever and which is provided with acounterweight 28 arranged to counter-balance the grlpping mechanism. Incase the gripping.

mechanism is radially withdrawn from the position shown by the brokenlines 21, Fig. 2, the counterweight 28 will be carried intothe positiondenoted by the broken lines 28, Fig. 2, by the rocking of the sleeve 7,but when the wire drawing block is in rapid motion the counter.- weight28 will be maintained in the position shown byfull lines in Fig. 2,being thrown outwardly by centrifugal force,

thereby rocking the sleeve 7 and throwing the draw bar 4.- into the reLss until its in ward motion is stopped by ts contact at 29,

' an angle with the draw bar, as shown, in"

machines of this class.

the coils of'wire are, wound and pushed gradually upward they arereceived upon the upright posts 31 in the usual manner in In order todisconnect the coil of wire from the grip to allow .the removal of thecoil from the block-the arms 13 and 14 are compressed by the operatorwho reaches his arm over the coiled wire and gains access to thegripping mechanism through the open top of the recess The pivotal pinGot the draw bar 4 is inclosed in slots 32 formed in ears 33 projectingfrom the side of the sleeve 7, in order to permit a slight longitudinalmovement of the draw bar for convenience the jaws to receive the end ofthe wire without movement of the block.

I claim 1. The combination of a rotating wiredrawing block, providedwith a recess in its side, a gripping mechanism pivotally con.-

nected with said block and arranged to be swung into and out of saidrecess, and means operated by centrifugal force for automaticallyholding said gripping mechanism in said recess when the block is inrotation.

2. The combination of a wire drawing block, a gripping mechanismpivotally connected to said block, a pivot on-said block parallel withits axis of rotation for said force when the block in adjusting nismheld approximately in surface of said block'when to said block, and

gripping mechanism, and means arranged to hold said gripping mechanismfrom outward movement on said pivot when said block is in rotation. I

The combination of a wire drawing block, provided with a'recesstoreceive a gripping mechanism, a gripping mechanism 7 pivotally connectedto said block and held in said recess by a pivot on said block in oneend of said recess parallel with the axis of rotation of the block, andmeans arranged to hold .said gripping mechanism. from swingingon saidpivot out of said recess. 1

when said blockis-in rotation. t 'kThg h 1 100 a grippin mec anism'ivota 1 connected to-said b%0ck,.a stud dh said block, an arm providedwith a counterbalance pivoted on said stud, and a series of leversconnecting said gripping mechanism and said arm, arranged to swingsaidgripping mechanism inward by outward movement of said counterbalance.

5. The combination of a Wire drawing block, a gripping mechanism pivotedto said block and arranged to" swing outwardly by centrifugal force when.said block is in rotation, a weight movable by centrifugal is rotated,said weight being operatively connected with said gripping mechanism tocounterbalance the cen-. trifugal force applied to the latter.

combination of a wire drawing 6. The. 'comblnation of a wire drawingblock, a gripping mechanism pivotally united to said block, a radial armattached to said gripping mechanism, a stud attached to said block, abell crank lever on said stud,

a link connecting said radialarm with one arm of said bell crank lever,and a counterbalance onthe other arm of said lever.

"7. The combination of a wire drawing block, a gripping mechanismpivotally connected with said block, said grippingmechanism heldapproximately in line with the surface of the block by'the draft ofthewire when theblock is. in

rotation, and means for holding said gripping mechanism from ou t" wardmovement when the draft of the wire is relieved during the rotationof'the block.

8. The combination of; a wire drawing block, a gripping mechanismpivotally con nected with said block, said gripping mechasaid block isin rotation,.- and means. for, holding said gripping mechanism fromoutward movement when the wire is released from said pp mechanism duringthe rotation of said block;

#9. The combination block having a recess in'its side, of a fixed studcarried-by the block in said recess, a sleeve mounted on said stud, agripping mechanism connected with .said sleeve and capable of a swingingmovement radially contact with the with a wire drawing aiitognaticyielding means;

l I l 1 for holding saidgripping mechanism from swinging radiallyoutward on said stud operative by the rotation of the block.

10. The combination of a wire drawing block, a gripping mechanismpivotally connected to said block, an arm radial with said pivotattached to said gripping mechanism, and means connected with saidradial arm for swinging said gripping mechanism on its pivotalconnection with said block, to carry said gripping mechanism toward thecenter of the block, when said block is in rotation.

11. The combination of a wire drawing block provided with a recess, adraw bar pivotally connected with said block, a gripping mechanismpivotally connected with.

said draw bar, and yielding means controlled by said draw bar said draw

